I have made the changes in mysql my.cnf file as per your suggestion and update you.
what should I do for removing the xcahe error. I think I am not using xcache in any of the setup.
Seems as if parts of your ispcnfig install have been removed if the directory /usr/local/ispconfig/server/plugins-core/ is missing.
Today I have upgrade my ispconfig installation, in there I also didn't find the plugins-core directory.
I have checked the older backups, where there is a plugins-core directory, but that is empty.
How can I restore this folder.
Again I am getting another error repeatedly like this
PHP Warning: mysqli::escape_string(): Couldn't fetch db in /usr/local/ispconfig/server/lib/classes/db_mysql.inc.php on line 204
PHP Warning: mysqli::mysqli(): (08004/1040): Too many connections in /usr/local/ispconfig/server/lib/classes/db_mysql.inc.php on line 71
DB::__construct Too many connections
my ispconfig version is 3.05 RC2.